Advanced Content Filter guides proof-read
Corrections in the main README file
Further corrections of the main README file
Merging from upstream.
Merging from upstream.
Docs for plugin integration with ACF corrected.
Merging from upstream.
Revision of the Integration section of Dev Guide.

Includes Loading CKEditor, Framed Editing (links corrected), Inline
Editing.
Revert "Revision of the Integration section of Dev Guide."

This reverts commit 018a267fc2148575de680810cb444f93e8b05342.
Framed Editing section of Dev Guide revised.
Loading CKEditor and Inline Editing sections revised.
Merging from upstream.
Bug reporting sections of Dev Guide revised.
Corrected code formatting in ACF note.
Merging from upstream.
Corrections in the Inline, Installation, Plugins and Skins sections.
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
File Browser integration section corrected.

- Removed PHP API reference (CKEditor 3.x only).
- Corrected links to CKFinder docs that did not work.
- Corrected the whole article to make it more clear.
- Updated screenshots to CKEditor 4.x.
Merge remote-tracking branch 'upstream/master'